Turning drive operable by pneumatic or hydraulic supply energy first for ball pivots and conical-cylindrical detents and control armatures operable inside an angular range of 90 degrees
HUH3393A
Throttling-closing valve
HUT47711A
Tight ball pivot usable for preinsulated district-heating pipings of plastic double-pipe puttable direct into soil
HUT62064A
Core drill
HUT45434A
Method and apparatus for fine machining spherical or flat surfaces
HUT41099A
United piston block
HUT40216A
Device for cutting the pipe liner of deep drilling wells advantageously oil wells after placing
HU192411B
Double closing device members particularly for building up the surface closing system of two pipe column well rormations
HU192547B
Stone bit rod stabilizer for drilling rig
DD218423A5
Winkelgetriebe to pipe closure, ins. for the petroleum industry
DD214648A5
Device for damping the axial vibrations of deep drying restaurants
HU190030B
Deep drilling fishing tool particularly for oil wells
HU184545B
Apparatus for damping the axial vibrations deep-well drill pipes
HU185431B
Angle drive for isolatingcock of oil industry
HU184179B
Casinghead for deep drilled wells particularly for oil or gas ones
